arch/x86/include/asm/sections.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_SECTIONS_H
   3 #define _ASM_X86_SECTIONS_H
   4
   5 #define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
   6
   7 #include <asm-generic/sections.h>
   8 #include <asm/extable.h>
   9
  10 extern char __brk_base[], __brk_limit[];
  11 extern char __end_rodata_aligned[];
  12
  13 #if defined(CONFIG_X86_64)
  14 extern char __end_rodata_hpage_align[];
  15 #endif
  16
  17 extern char __end_of_kernel_reserve[];
  18
  19 extern unsigned long _brk_start, _brk_end;
  20
  21 static inline bool arch_is_kernel_initmem_freed(unsigned long addr)
  22 {
  23         /*
  24          * If _brk_start has not been cleared, brk allocation is incomplete,
  25          * and we can not make assumptions about its use.
  26          */
  27         if (_brk_start)
  28                 return 0;
  29
  30         /*
  31          * After brk allocation is complete, space between _brk_end and _end
  32          * is available for allocation.
  33          */
  34         return addr >= _brk_end && addr < (unsigned long)&_end;
  35 }
  36
  37 #endif  /* _ASM_X86_SECTIONS_H */